I was referring to the card table with a rectangular cutout that fits the bottom of a full size case. It looks a lot like the one for the FW but does not have any notches - however it does come with the cutout in two sizes, the other fits the 3/4 size case
Though you did do very well to get that cabinet for $80 as that is quite rare - did you get the special knee pedal to go with it? If you are saying that's a full size case in the cabinet, that would be very rare. I've not run into any literature saying Singer made that cabinet for a full size machine.